F1 to F12 on a keyboard are a set of function keys that are usually located on the top and sides of the keyboard, and the exact position may vary depending on the keyboard model. These keys serve different purposes in different software and operating systems:
F1: Usually used as a shortcut for help or hint functions. In most applications, pressing F1 will bring up a help window or menu. f2: The name of the file or object used to edit. In some text editors and file managers, pressing F2 can edit the name of a file or folder. f3: Used for the search function. Press F3 in the file manager to open a search box for searching for files or folders. F4: Quick access to the Address Bar or Command Prompt. In Windows operating systems, pressing F4 gives you quick access to the address bar in a file manager, or opens a command prompt in some text editors. f5: Refresh the page or update the list. In a web browser, press F5 to refresh the current page. In some applications, pressing F5 can update or refresh the list. F6: Move focus to the address bar or other areas in the window. In a web browser or file manager, press F6 to move focus between the address bar and other areas. F7: In some text editors, pressing F7 allows you to check your spelling. F8: Access the boot menu during the boot process or edit the boot options in the Windows operating system. While booting up the computer, press F8 to access the advanced boot options. In some applications, pressing F8 opens an editing window for a macro or command. f9: In some applications, such as Excel, pressing f9 can recalculate all formulas. f10: Activates the menu bar. In some applications, pressing F10 activates the menu bar, enabling the use of keyboard shortcuts to navigate and select menu items. F11: Full-screen mode or browse mode. In a web browser, press F11 to switch the browser window to full-screen mode. F12: In a web browser, press F12 to open the developer tools to view and edit the HTML of the web page. The usage of these function keys may vary depending on the specific application or operating system. In some cases, pressing a function key combination (e.g., Ctrl+F1, Alt+F1, etc.) can perform more specific actions.